mozilla/openbadges — pull request #592 by toolness (2013-02-21 21:00:47+00:00)
Title: Added Badge.isExpired() to Backbone Badge model.

We're only looking at the stored expiration date and not checking to see if it's been changed on its original host, but this should be enough to implement the solution proposed in https://github.com/mozilla/openbadges/issues/47#issuecomment-13801760.